this post was submitted on 25 Oct 2023
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Climate - truthful information about climate, related activism and politics.

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Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.

As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades: Graph of temperature as observed with significant warming, and simulated without added greenhouse gases and other anthropogentic changes, which shows no significant warming

How much each change to the atmosphere has warmed the world: IPCC AR6 Figure 2 - Thee bar charts: first chart: how much each gas has warmed the world.  About 1C of total warming.  Second chart:  about 1.5C of total warming from well-mixed greenhouse gases, offset by 0.4C of cooling from aerosols and negligible influence from changes to solar output, volcanoes, and internal variability.  Third chart: about 1.25C of warming from CO2, 0.5C from methane, and a bunch more in small quantities from other gases.  About 0.5C of cooling with large error bars from SO2.

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[–] theneverfox@pawb.social 11 points 1 year ago (2 children)

Whenever I see this, I always wonder - what effect does the change in atmospheric composition have on humans?

[–] nyoooom@lemmy.world 8 points 1 year ago (1 children)

Directly, pollution is responsible for quite a surplus of deaths in densely populated areas.

Apart from that the CO2 isn't that much to have a significant effect on us.

Also microplastics, sadly.

[–] arin@lemmy.world 12 points 1 year ago (2 children)

People are dumber with higher CO2 concentrations. No joke bring a brilliant person and they will struggle. This is why we need good ventilation in classrooms because it can get stuffy(low O2 and high CO2)

[–] JohnDClay@sh.itjust.works 2 points 1 year ago

How high of a ppm do you need to get that effect?

[–] RandomVideos@programming.dev 1 points 1 year ago* (last edited 1 year ago)

The government started pollution so people would get dumber and not question it

source

[–] FrostyCaveman@lemm.ee 2 points 1 year ago (1 children)

Making the atmosphere more akin to stuffy offices with bad air flow, mid-afternoon, but globally. Hmm.

[–] JohnDClay@sh.itjust.works 2 points 1 year ago (2 children)

What is the co2 ppm in a stuffy office I wonder.

[–] onlym3@lemmy.world 2 points 1 year ago

I teach at a secondary school in the UK, in a classroom with no external windows (but with air quality monitors). After 1 hour of 30 teenagers the co2 will be at around 2000-2500ppm which I can confirm is stuffy. Highest I've seen is in the next door classroom which made it up to 3800ppm back in the summer.

It really does make you (and the kids) feel really dopey, so not exactly ideal.

[–] FrostyCaveman@lemm.ee 2 points 1 year ago (1 children)

Looked into this a while ago and I seem to recall 1000-2000ppm is “very stuffy office” territory.

(At one point I worked in a really terrible office and was considering trying to measure it somehow)

[–] JohnDClay@sh.itjust.works 2 points 1 year ago (1 children)

Looks like about 350 years till we get to 1000ppm at this rate. I'm guessing we'll die of being cooked before we get much dumber, but it's an interesting side effect.

[–] theneverfox@pawb.social 1 points 1 year ago

Well here's the thing... There's a huge difference between levels where acute exposure causes something noticable, and living with exposure to something all the time